System Design Interviews in 2026 — The Working Approach
Practical system design interview: framework, capacity estimates, scaling patterns, and what senior engineers actually look for vs cargo-cult answers.
Interview
Design Uber — Location Tracking, Dispatch, and Surge in System Design
A complete system design for a ride-hailing platform. Geohash / S2 / H3 indexing, real-time location ingestion, dispatch matching algorithms, ETA prediction, surge pricing, and the operational realities at scale.
Design Twitter / News Feed — A System Design Walkthrough
End-to-end system design for a Twitter / News Feed service. Functional + non-functional requirements, capacity, schema, fanout-on-write vs fanout-on-read, hybrid for celebrities, ranking, caching, and what interviewers love.
Design a URL Shortener — A Complete System Design Walkthrough
End-to-end system design for a URL shortener — requirements, capacity estimation, ID generation (counter, hash, base62), schema, caching, analytics, abuse prevention, and the parts most write-ups skip.